Arbor for core boxes



`Aug. 25, 1925. 1,550,886

- H. L. DEMMLER ARBOR FOB CORE. BOXES Filed Sept. 29, 1924 .i-l.. im Wm a w aww/f a wie Patented Aug. 25, 1925, l t' UNITED STATES HENRY LOUIS DEMMLEB, O1? KETNANEE, ILLINOIS.

ARBOR FOR Application :filed September .To all whom it may concern.

Be it known that I, HENRY L. DEMMLER, a citizen of the United States of America, residing at Kewanee, in the county of Henry and State of Illinois, have invented a new and useful Arbor for Core Boxes. of which the following is aaspecification.

My invention relates to arbors for core making, handling and casting, and'is more particularly designed for use with core making apparatus of the character described in my Patent #1,480,747 issued January 15, 1924. As explained in this Patent #1,480,- 747 a mold or core box is clamped against a sand container from which sand is forced into the mold or core box by compressed air. y

"` every portion or recess of the core box, so

that' when the core box is removed the core will be firmly supported upon the arbor and of the exact conformation desired.

One of the primary objects of my invention is to provide a core arbor construction which will not only permit the escape of the air from within the core along the stem of the arbor, but will also have means extending into portions of the core remote from the arbor and the tuyres in the core mold box through which the sand is driven. by the compressed air.

A further object of the invention is to provide an arbor structure which is collapsible, for removal through an opening in the casting after the casting has been made by the core and a collapsible arbor structure wherein the component parts will be held in interlocking relation when positioned for molding operations. n

A still further object of the invention is to provide a combined collapsible arbor and reenforcing means for core constructiono conn Boxes.

ze, 1924. serial no. 740,451.

Other objects will be appreciated and understood from the description and claims and from the drawings in which:

Fig. 1 is a longitudinal diametral section of the core box and core arbor con structed in accordance with one form of my invention and Fig. 2 is a sectional view of the core box shown in F ig. 1 taken on the line 2-2 thereof.

The core box and arbor illustrated in the drawing comprise a mold formed in two portions 2 and 4 which may be fitted to gether in any suitable manner and are of the shape, on the interior thereof, of the core to be made. hrough portions of the wall I forni a number of perforations or tuyeres 6 through which core making sand is blown by compressed air as described in the patent above mentioned. These tuyeres 6 may be formed through the walls at any desirable points, although in the preferred form illustrated I have shown them as passing through the top member 2 of the core box.

An arbor stem generally designated 8 is arranged to be supported horizontally or otherwise within the core box and has out-- wardly tapered portions 10 and 12 which are arranged to engage in tight fitting relation to tapered ring stopper members 14 and 16 placed over the ends thereof and forced into the openings provided by outwardly projecting portions 18 and 2O of the portions of the core box. The stem 8 is also provided with tapered portions 22 and upon which hanger members generally designated 24 are secured by means of corresponding tapers formed on the inner faces of two of their adjacent interlocking parts. These hangers 24 may be composed of two, three or more interlocking parts 26, 28 and 30 (3 interlocking'parts shown in the drawing) and are assembled about the stem 8 on untapered portions thereof and held in interlocking relation through interlocking shoulders 32, 34 and 36 by any suitable means, as for instance, by hand, until they have been moved longitudinally of the ,stem to engage their interiorly tapered faces with 'the tapered faces 22 of the stem.. At this point the 1( wedging action of the taper 22 forces the interlocking shoulders 32, 34: and 36 into tight and relatively permanent engagement from which kthey can be displaced only by driving out the stem. After the casting has been made the stem S is driven out by tapping it on the end, whereupon the several portions of the interlocking hanger members will be disengaged and may be Aremoved through the openings in Vthe casting corresponding to the portion of the core between the liared portions 18 and 2O of the core box.

In order to permit the escape of the air blown into the mold with the sand and from all portions of the core being formed, l provide this stem with a series of the perforations 38 which are of such sizer that the air may pass out into the hollow central portion a() thereof and thus out the ends. 1Each member 26, 28 and 30 of the hangers 24 is provided on its interior with passageways which inter-communicate and with openings 42 and 44C in the stem. The member 30 may be arcuate, as shown in Fig. 2, or of any desirable shape and configuration but at suitable points, l provide number of minute perforations 46 communicating between the exterior and the hollow interior. These perforations 46 are of substantially7 the same size and character and perform the same function as those in the stem indicated at 38. They may be placed as may be best determined by practice, in positions where they will thoroughly afford egress of the air from the mold or sand during the core formation.

From the foregoing description it willbe clear that- V haveY not only. provided a novel arbor construction, but l have provided a runicpae/ arrangement lwhereby 4the cores may `be Amade, homogeneous, throughout and as well providewacore arbor andcorereenforcing means which may be readily assembled and4 dissembledfrom withinl the casting. herefore, l do not wish to be limited to the details of the construction shown or described for many equivalent structures will be readily perceived. and come within the spirit and scope of the invention anddeinitionof the appended claims.

l. rlnarborfor cores comprising, a hollow emand hollow core-reenforlcing means on an arbor for cores comprising, a hollow stem, hollow corereenforcing means on said stem and connecting passages between said stem and reenforcing` means. l

An arbor for cores comprising, a hollow stem, hollow core-reenforcing means on saidA stem, connecting passages between `said stem and reenforcing means and passages communicating between the interior `and exterior of said reenforcing means.

Ll-[rn arbor for cores comprising, a hollow stem, means on said stein adapted to extend into the core body and passages through said means communicating with the interior of said stem- 5. An arborfor cores comprising, a hollow stem, means on said stem adapted to extend into relatively remote port-ions of a core thereabout and' passagesfrom exterior remote portions of said means to the interior of said stem.

G. An arbor for cores comprising, a hollow stem having perforations therein, means on said stem adapted to extend into remote portions of a core formed thereabout and passages through said means in communication with said perforations.

7. An arbor for cores comprising, a hollow stem having perforations therein, means on said stem adapted to extend into remote portions of a core formed thereabout and passages through said means; in communication with some of said pgrforations.

8. An arbor for cores comprising, a hollow stem having a plurality of openings therein extending from the interior 'to the exterior thereof and means removably en- :gaged with said stem, adapted to extend into remote portions of a core about said stem. v

9. An arbor for cores comprising, a hollow stem having a plurality of openings therein communicating between the interior and 'exterior thereof and means removably lconnected to said stem adapted to extend into remote portions of a core about said stem', said means having a passage extending from van exterior portion and communicating with one of said openings in said stem. v l

lO. ln an arbor for. cores, the combination with al stemfhollow throughout its length and Ihaving minute-openings anda larger Vopeningv in the walls thereof, of means for egress of gas from the more remote portions ofa c'ore formed about said stem comprising, hollow'membe-rs interlockingly engaged together and to said stem at said larger opening whereby the members may be readilyv removed from aA'casting thereabout and a continuous passage is formed between the ,interiors of said members and said larger opening, and minute openings in the walls ofrsome of said members whereby communication is established between the interior andexterior thereof. y

dll. In combination with a core making apparatus for making air blown cores, an

arbor, means for exhausting air from interior portions of the body of the core remote from said member.

l2. Inv combination with apparatus for making air blown cores, a hollow member adapted to be supportedin a part of said apparatus and means having openings for exhausting air Yfrom the body of the core to be formed remote from said member,

13. In combination with a core boX 'for making air blown cores, a hollow and perforated member adapted to be supported within a part of the interior of said box and means in connection with said member having minute openings for exhausting air from the body of the Core to be formed.

14. In combination with a core boX for making air blown cores, a hollow and perforated membel1 adapted to be supported 10 within a part of the interior of said box and having arms formed with exterorly communicating air passages adapted to eX- tend into remote portions of said core box for exhausting air' from the body of the 15 core to be formed.

HENRY LOUIS DEMMLER. 

